CN105009520B

CN105009520B - For transmitting the method for content and its device in a communication network

Info

Publication number: CN105009520B
Application number: CN201480011508.XA
Authority: CN
Inventors: 李宗玟; 扈龙焕; 李璟埈; 权阿芿
Original assignee: SK Telecom Co Ltd
Current assignee: SK Telecom Co Ltd
Priority date: 2013-06-10
Filing date: 2014-04-25
Publication date: 2018-06-01
Anticipated expiration: 2034-04-25
Also published as: US10594803B2; WO2014200177A1; KR102070149B1; CN105009520A; KR20140144321A; US20150341449A1

Abstract

The present invention relates to for transmitting the method for content and its device in a communication network.The present invention provides a kind of content delivery services, in the content delivery service, buffer control device storage includes the service list of the service type provided by content server, and when user equipment is sent to content server asks, buffer control device sends the content based on corresponding service type to user equipment instead of content server by referring to service list.

Description

For transmitting the method for content and its device in a communication network

Technical field

The present invention relates to content delivery techniques, more particularly, to according to service type in a manner of differentiation by content It is transmitted to the method and its device of user equipment (UE).

Background technology

Recently, the performance of user equipment (UE) (such as smart phone) and mobile communication technology are developing by leaps and bounds.Cause This, user has been able to access the network service provided by content supplier (CP) by UE with any place at any time Device, and use various contents (such as photo, video, audio and application).In addition, the ambulant movement by ensuring user Network (for example, mobile communications network) is being constantly increasing using the frequency of content.

However, although the Limited Number of the network server by CP offers, the user of network server is desired access to Number promptly increase.For this reason, there are such as loss of data, bottleneck, transmission delay and data Various problems as discontinuity.In order to solve these problems, there has been provided content distribution network (CDN).

CDN is for steadily transmitting the service of various types of contents (such as photo, film and music video) to UE. More specifically, CDN provides the buffer storage for being widely distributed in the main point in network.These buffer storages replicate simultaneously in advance It is present in part or all of the various contents in the network server of the CP away from UE, is there is large capacity interior Hold (such as image, video and audio) or often asked by UE.Then, when receiving content request message from UE, it is located at UE is sent the content to closest to the buffer storage of UE.As a result, CDN can improve access to content speed and steadily provide Content.

The content of the invention

Technical problem

Content transmission clothes can be provided in a manner of differentiation according to service type it is an object of the invention to provide a kind of The method and its device of business.

The present invention is also directed to a kind of content of the load for the original server for being capable of providing and can reducing supplying content Transmit the method and its device of service.

The present invention is also directed to a kind of method for the content delivery service for being capable of providing and can reducing the business in network And its device.

Technical solution

According to the embodiment of the present invention, a kind of buffer control device for content transmission includes：Interface module, quilt It is configured to communicate with buffer storage and content server；Memory module, service list have corresponding in service list record Content server service type；And control module, be configured to from the interface module receive and ask in The content request message of appearance and from the interface module receive and transmit the content content response message in Lack one to identify the content server, it is described to be determined with reference to the service list stored in the memory module The service type of content server, and perform control so that the indicator of service type determined by instruction is connect by described Mouth mold block is sent to the buffer storage.

According to the embodiment of the present invention, a kind of buffer storage for content transmission includes：Interface unit, be used for User equipment (UE) and buffer control device communicate；Storage unit has multiple for being stored according to service type The storage space of content；And control unit, it is configured to connect from the buffer control device by the interface unit When receiving the indicator of the service type of instruction content server, service type, and root are found by the indicator received Control is performed according to the service type found so that content is sent to the UE in a different manner.

According to the embodiment of the present invention, a kind of method that content for buffer control device transmits includes following step Suddenly：From the content request message for request content and for transmit the content content response message in it is at least one come Identify content server；Reference record has the service list of the service type of corresponding content server to determine the content clothes The service type of business device；And the indicator of service type determined by instruction is sent to buffer storage.

Advantageous effect

According to the present invention, in the case of first service, the transmission of content server is stopped, and buffer storage is by oneself Provide content to user equipment (UE), enabling removal is placed in the respective treated load with content server sheet.By It is set within the access network in this cache server, therefore user can experience the transmission speed significantly improved in practice Rate.In the case of second service, the data sent from content server are not transmitted actually.On the contrary, buffer control device Transmission of the control buffer storage by including label information controls indicator to send same data.Therefore, even if content service The load of device is kept intact, and can also be reduced the business in network and be prevented transmission delay.Specifically, the invention allows to The message identification service target sent and received between UE and content server.In addition, the invention allows to pass through service List (such as first service and second service) is according to service type come management objectives.Therefore, it is possible to be carried according to service type For differentiated service.

Description of the drawings

Fig. 1 is the figure for instantiating content distribution system according to the embodiment of the present invention.

Fig. 2 is the construction of the buffer control device in the content distribution system shown according to the embodiment of the present invention Block diagram.

Fig. 3 is the frame of the construction of the buffer storage in the content distribution system shown according to the embodiment of the present invention Figure.

Fig. 4 is the phase for data transmission in the connection content distribution system instantiated according to the embodiment of the present invention The flow chart of the method for the component answered.

Fig. 5 is the flow chart for the method for instantiating transmission content according to the embodiment of the present invention.

Fig. 6 is the flow chart for the method for instantiating transmission content according to the embodiment of the present invention.

Fig. 7 is the flow chart for the method for instantiating transmission content according to the embodiment of the present invention.

Fig. 8 is the flow chart for the content transfer method for instantiating buffer control device according to the embodiment of the present invention.

Fig. 9 is the flow chart for the content transfer method for instantiating buffer storage according to the embodiment of the present invention.

Specific embodiment

Hereinafter, describe in detail with reference to the accompanying drawings the present invention, so that the field of the invention in ordinary skill people Member can easily realize exemplary embodiments of the present invention.In the detailed description of exemplary embodiments of the present invention, When determining that the detailed description on known technology related to the present invention unnecessarily obscures the purport of the present invention, this will be omitted It is a little to be described in detail.This is in order not to obscure the core of the present invention, but clearly transmits this by omitting unnecessary description The core of invention.

When element is referred to as " connecting " or during " coupled " to another element, it can be directly connected to or be connected to another member Part may have intermediary element.The term used in this specification only for describe particular implementation purpose, without It is intended to the limitation present invention.Unless the context clearly dictates otherwise, otherwise singulative " one ", "one" and "the" are also intended to bag Include plural form.As used herein, term " including (comprises) ", " including (comprising) ", " include (includes) " and " including (including) " refers to that there are the feature, number, step, operation, element, component or its groups It closes, but does not preclude the presence or addition of one or more other features, number, step, operation, element, components or groups thereof.

Term as such as " first " and " second " be used to describe various elements.These terms are only applied to one Element distinguishes rather than limits these elements with other elements.Throughout the drawings, identical reference numeral reference is held The similar function of row simultaneously achievees the effect that similar part, and the repeated description that will omit these parts.

With reference to Fig. 1, content distribution system according to the embodiment of the present invention includes user equipment (UE) 100, caching dress Put 300, buffer control device 500 and content server 700.

UE 100 can access content server by accessing network 200, core network 400 and public network 600 700.Access network 200 is included in the network for the network entity that wireless zone service is provided in cellular system.For example, access net Network 200 can be by multiple base stations (BS) (such as base transceiver station (BTS) and Node base station (NodeB)) and base station controller (BSC) (such as radio network controller (RNC)) is implemented.In another example, accessing network 200 can be by an entity (such as enode base station (eNodeB)) is implemented.In another example, access network 200 can include digital units (DU) With radio unit (RU).DU and RU is by by the digital signal processing unit integrally realized in a base station and wireless signal Processing unit is separated and constructed each other.Here, multiple RU are connected to a DU.400 managing user information of core network (it is the information on the user for being provided with communication service), and execution circuit exchanges or packet switch.In addition, core network Mobility between 400 management frequencies, and manage and control access network 200 and business in core network 400 and with it is another The interoperability of network (for example, public network 600).Core network 400 includes the entity for performing above-mentioned function.These entities by with Lower item illustrates：Mobile switching centre (MSC), attaching position register (HLR), mobile mobility entity (MME), home subscriber Server (HSS) etc..Public network 600 is to exchange the one of information according to transmission control protocol/Internet Protocol (TCP/IP) As open network.Such public network 600 is illustrated by the internet using IP.Public network 600 is connected to content service Device 700.

Content server 700 is used for storage content, and various contents are supplied to UE 100 according to request.Here, it is interior Hold by photo, video, audio, using etc. illustrate.Content server 700 is the clothes run by so-called content supplier (CP) Business device, and multiple of UE 100 can be provided content to.Such content server 700 is by network server, network Application server (WAS) etc. illustrates.

UE 100 reappears the content for receiving the content from content server 700 according to the request of user. For example, UE 100 searches the uniform resource locator (URL) of the content by user's request.Hereafter, UE 100 can pass through domain name System (DNS) etc. obtains corresponding with the URL, content server 700 address information (IP address).UE 100 takes from content Business device 700 asks content corresponding with the address information and receives the content.

Buffer storage 300 is located between access network 200 and core network 400, and buffer control device 500 is located at core Between heart network 400 and public network 600.In other words, buffer storage 300 and buffer control device 500 are located at 100 Hes of UE Between content server 700.Here, the interchanger of the instruction of reference numeral 210 connection access network 200 and core network 400 (switch), and reference numeral 410 indicates to connect the interchanger of core network 400 and public network 600.Here, caching dress Put 300 and buffer control device 500 network is connected to by interchanger 210 and 410 respectively, but the invention is not restricted to this.It is excellent Choosing, planned network topological structure so that all data warp sent and received between UE 100 and content server 700 Cross buffer storage 300 and buffer control device 500.As long as designing such network topology structure, buffer storage 300 and caching Control device 500 can be set in any place.

It is constructed according to above system, the content requests from UE 100 need to fill via buffer storage 300 and buffer control It puts 500 and is transmitted to content server 700.In addition, by content server 700 be sent to UE 100 content (data) need via Buffer control device 500 and buffer storage 300 are transmitted to UE 100.Therefore, buffer control device 500 can be from by UE 100 The information that the header of the content request message of content server 700 includes is sent to identify the domain of content server 700.Separately Selection of land, buffer control device 500 can be from the header of content response message of UE 100 be sent to by content server 700 Including information identify the domain of content server 700.

Buffer storage 300 and buffer control device 500 provide various types of content distribution networks (CDN) service.For example, Be capable of providing first service, wherein, buffer storage 300 in the case where load not being placed on content server 700 alone Ground provides content to UE 100.Alternatively, second service is capable of providing, wherein, do not reduce the negative of content server 700 It carries, and is the reduction of the business in network.In addition to such service, various types of services can also be provided.Therefore, delay These service types can be classified and provide service by cryopreservation device 300 and buffer control device 500.For this purpose, caching control Device 500 processed has such service list, the class in the service list to the service that will be provided for content transmission Type is classified and is stored.In service list, service goal is classified according to service type.Therefore, buffer control fills Put the 500 message extraction domains sent between UE 100 and content server 700.Hereafter, with reference to service list, buffer control dress Put the type of the service of the transmission of 500 contents that can determine content server 700 to be provided for.For example, buffer control Device 500 will be carried out using service list for the service type of content server 700 or the content of content server 700 Classification.Buffer control device 500 and buffer storage 300 share these service types, and use in these service types pair The method answered provides service.

Buffer storage 300 is located between access network 200 and core network 400, and can receive from content service The all or part of copy of the content of device 700, and store received copy.According to an embodiment, buffer storage 300 It can use and replicate and store the mirror method for the business that UE 100 is sent to from content server 700.According to another embodiment party Formula, using caching method, buffer storage 300 can receive and store the content from content server 700 in advance.Hereafter, delay Cryopreservation device 300 can replace content server 700 to be sent out content according to the method for servicing indicated by buffer control device 500 Give UE 100.

Buffer storage 300 and buffer control device 500 can supervise between UE 100 and content server 700 The grouping exchanged between UE 100 and content server 700 is surveyed, and kidnaps being passed with content among (hijack) these groupings Defeated relevant grouping.

Specifically, when buffer storage 300 replaces content server 700 according to the control of buffer control device 500 by content When being sent to UE 100, buffer storage 300 can be taken the contents processing by content using the IP address of content server 700 The grouping that business device 700 is sent, and send the grouping.

In this way, when UE 100 and/or content server 700 cannot identify the offer of content delivery service, delay Cryopreservation device 300 and buffer control device 500 can provide content delivery service.Fig. 2 is to show embodiment party according to the present invention The block diagram of the construction of buffer control device in the content distribution system of formula.

With reference to Fig. 2, buffer control device 500 according to the embodiment of the present invention includes interface module 510, memory module 520 and control module 530.

The various data that interface module 510 is sent and received for monitoring by core network 400 or public network 600, Or for sending and receiving these data.Specifically, interface module 510 is used for the buffer storage 300 with being connected to UE 100 It communicates with content server 700.For this purpose, interface module 510 can include mirror module and injection (injection) mould Block.Mirror module replicates the data transmitted by core network 400 or public network 600, and the data are transmitted to control Molding block 530.Injection module will be sent out from the data that control module 530 receives by centric data networks 400 or public network 600 Give buffer storage 300 or content server 700.Therefore, by the connection with UE 100, interface module 510 can receive this The content request message of sample, UE 100 utilize the content request message from 700 request content of content server.In addition, by with The connection of content server 700, interface module 510 can such content response message, reception content server 700 was using should Content response message provides content to UE 100.

Memory module 520 stores for data.Memory module 520 is stored with service row according to the embodiment of the present invention Table.In service list, record has the service type of corresponding contents server 700.In other words, content biography is provided for The type of defeated service is determined by service list.The storage of this service list for identify the identification information of service goal and Service (for example, first service or second service) to be applied to the service goal indicated by the identification information.For example, when the When one service is provided to service goal, first service can store in lists, and when second service is provided, second Service can store in lists.Here, identification information can be domain, the URL that is stored with specific content etc..Therefore, in basis In the service list of embodiments of the present invention, it with content server 700 can be unit or will be serviced by unit of content Target is classified.When service goal is classified for unit with content server 700, the service of identical type is provided To all the elements of content server 700.When service goal is classified as unit using content, different types of service can To be provided to the corresponding inclusive segment stored in content server 700.It is false in illustrative embodiments described below Determine service type in service list according to content server 700 to be classified, but the invention is not restricted to this, and takes Service type can classify according to inclusive segment.Therefore, in service list according to the embodiment of the present invention, content service The domain of device 700 is mapped to service type and stores.Therefore, control module 530 is sent out between UE 100 and content server 700 The header of the message sent extracts domain.With reference to the service list stored in memory module 520, control module 530 can determine The type of service to be applied when content server 700 sends content.

Control module 530 exchanges message via buffer storage 300 by interface module 510 with UE 100.In this way, Control module 530 establishes the connection with UE 100 via buffer storage 300.In addition, control module 530 and content server 700 Message is exchanged, thus establishes the connection with content server 700.

When foundation connection as described above, control module 530 can receive such content by interface module 510 please Message (for example, hypertext transfer protocol (HTTP) obtains HTTP get) UE 100 is asked to be taken using the content request message from content Business 700 request content of device.In addition, control module 530 can receive such content response message by interface module 510 (for example, HTTP response), content server 700 provide content to UE 100 using the content response message.Therefore, Control module 530 is interior by being identified from the information of content request message or content response message extraction (for example, URL or DNS) Hold server 700.Hereafter, control module 530 is referred to the service list stored in memory module 520 to determine to be carried Supply content server 700 or for content server 700 content transmission service type.

When being determined as first service, control module 530 will quilt to the notice of buffer storage 300 by interface module 510 It is first service to provide for the type of the service of corresponding contents transmission.Control module 530 can be according to passing through interface module 510 The caching received checks indicator to determine that buffer storage 300 has content.It sends caching and checks indicator to provide caching Device 300 is stored with the notice of corresponding contents.

When receiving caching inspection indicator, control module 530 can pass through 510 content of announcement server of interface module 700 do not retransmit content in the case of repeating transmission.In addition, the connection with UE 100 due to the abduction by buffer storage 300 and After discharging (CONNECTION HIJACKING), control module 530 can establish the passage with buffer storage 300, and release Put the connection with content server 700.

When definite service to be provided is second service, control module 530 is by interface module 510 to buffer storage The type that 300 notices will be provided for the service of corresponding contents transmission is second service.Control module 530 can with according to whether It receives caching and checks indicator to determine whether buffer storage 300 is stored with the content of the target as second service.When true When determining buffer storage 300 and being stored with the content, control module 530 will be transmitted control indicator by interface module 510 and is sent to Buffer storage 300.Here, transmission control indicator makes buffer storage 300 send and the content that is sent by content server 700 The cell data (for example, block (chunk) or grouping) of the identical content of cell data.For this purpose, transmission control indicator includes referring to Show the label information for the cell data to be sent by buffer storage 300.For example it is assumed that the content includes first module data to the Ten cell datas.Furthermore, it is assumed that the 4th cell data to the 6th cell data is sent to UE 100 by content server 700.Cause This, control module 530 can receive the 4th cell data to the 6th unit number by interface module 510 from content server 700 According to.At this point, control module 530 is not sent the 4th cell data to the 6th cell data received by interface module 510 To buffer storage 300.On the contrary, control module 530 only sends to identify the label of the 4th cell data to the 6th cell data Information.For this purpose, control module 530 can be by all or part of progress of the cell data sent by content server 700 Compression, and compressed data are used as label information.Alternatively, 530 use of control module by with buffer storage 300 Mutually agree to predetermined hashing algorithm, hashed value is generated from the cell data sent by content server 700.In addition, control Module 530 can use generated hashed value as label information.Therefore, it is possible to reduce buffer control device 500 and caching The business in core network 400 between device 300.

In addition, control module 530 can adjust the transmission rate of transmission control indicator, to eliminate buffer control device Transmission delay between 500 and content server 700.For example, control indicator when receiving transmission from buffer control device 500 When, the content stored is sent to UE 100 by buffer storage 300.It is assumed that from content server 700 to buffer control device 500 Content cell data arrival time (two-way time (RTT)) for 10ms, then buffer control device 500 is without considering unit Data whether from content server 700 reach in the case of, all the label information of cell data is sent to the interval of 10ms Buffer storage 300.Therefore, buffer storage 300 can be by cell data corresponding with the label information of the interval reception with 10ms It is sent to UE 100.It therefore, also can be with steady even if when there is delay between buffer control device 500 and content server 700 Fixed speed provides content to UE 100.In addition, when buffer storage 300 does not have corresponding content, control module 530 is not In the case of considering first service or second service, the inclusive segment being sequentially received from content server 700 is sent to slow Cryopreservation device 300.

With reference to Fig. 3, buffer storage 300 includes interface unit 310, storage unit 320 and control unit 330.

Interface unit 310 is monitored or sent and received to be sent and received by accessing network 200 or core network 400 Various data.Specifically, interface unit 310 communicates with UE 100, and for being connected to content server 700 Buffer control device 500 communicates.For this purpose, interface unit 310 includes mirror module (not shown) and injection module (does not show Go out).Mirror module replicates the data transmitted by accessing network 200 or core network 400, and the data are transmitted to control Unit 330 processed.Injection module by access network 200 or core network 400 by from the data sending that control unit 330 receives to UE 100 or buffer control device 500.Therefore, interface unit 310 can receive such content request message, and UE 100 is utilized The content request message is from 700 request content of content server.In addition, interface unit 310 can receive such content response Message, content server 700 provide content to UE 100 using the content response message.

Storage unit 320 can be stored in a part for each inclusive segment stored at least one content server 700 Or whole copy.According to mirror image technology, control unit 330 can by from the service duplication that content server 700 is sent to UE 100, and the business is stored in storage unit 320.Alternatively, control unit 330 can be in advance received from content The specific content of server 700, and the content received is stored in storage unit 320.Embodiment party according to the present invention Formula, storage unit 320 assign the different memory spaces depending on service type.For example, the first memory space can be assigned to use In first service, and the second memory space can be assigned for second service.Here, the content in the first memory space is pre- Without being deleted during the period first set.On the other hand, the content in the second memory space can be protected according to its frequency It holds or deletes.Pre-set volume is assigned to the second memory space, and is lined up according to first in, first out (FIFO) by content It is stored in the second memory space.When there is the request for content, if the content is not stored at the second storage sky Between in, then receive the content from original server (that is, content server 700).Hereafter, the content received is inputted and stored In the queue of the second memory space.At this point, since the second memory space is lined up according to FIFO, when no enough Memory space deletes the content stored at first come when storing new content.On the other hand, when there is the request for content, If being stored with the content in the second memory space, the content stored is again inputted into the queue of the second memory space In, as being stored again the content.In this way, the content stored in the second memory space can be according to content The frequency of request be deleted or keep.

Control unit 330 is used to control the whole operation of buffer storage 300.Control unit 330 can pass through interface unit 310 receive the content response message including information response's indicator.The instruction of information response indicator to be directed to specific content and The type of the service of offer.Therefore, control unit 330 is it can be found that indicated by information response's indicator and to be directed in corresponding The type for the service held and provided.

When the type of service is first service, control unit 330 is used to be included in the content response message received The part of content determine whether there is the content.In the case of first service, it can store content in for In first memory space of one storage unit 320 for servicing and assigning.When definite storage unit 320 has content, control is single Member 330 notifies buffer storage 300 to have content by interface unit 310 to buffer control device 500.

Then, in order to provide first service, control unit 330 obtains to connect from the confirmation message sent by UE 100 Connect the information of foundation.Hereafter, control unit 330 kidnaps the connection between UE 100 and buffer control device 500, and establishes slow Connection between cryopreservation device 300 and UE 100.Then, control unit 330 will be used for request channel foundation by interface unit 310 Path Setup request message be transmitted to buffer control device 500, thus establish and the passage of buffer control device 500.Then, Buffer control device 500 discharges the connection with content server 700.Control unit 330 can by the connection with UE 100 come The content of retention is sent to UE 100.At this point, control unit 330 can regularly protect the passage that passage is kept for request It holds request message and is sent to buffer control device 500 so that be kept passage before sending in the content of all retentions.

In addition, when the type of service is second service, 330 use of control unit is received from buffer control device 500 The part of content that includes of content response message, to determine whether there is the content.It, can in the case of second service To store content in the second memory space of the storage unit 320 for being directed to second service and assigning.When definite storage unit 320 have content when, control unit 330 by interface unit 310 to buffer control device 500 notify buffer storage 300 have Content.Therefore, buffer control device 500 finds that buffer storage 300 has content.In addition, buffer control device 500 will include using Buffer storage 300 is sent in the transmission control indicator of the label information of recognition unit data.Control unit 330 passes through interface Unit 310 controls indicator to receive the transmission.Hereafter, control unit 330 is led to according to the label information of transmission control indicator It crosses interface unit 310 and the cell data of constitution content is sent to UE 100.For example, buffer control device 500 can will hash Value is sent to buffer storage 300.Then, the control unit 330 of buffer storage 300 can be extracted from storage unit 320 and had The corresponding unit data of hashed value, and the cell data extracted is sent to by UE 100 by interface unit 310.

In addition, when storage unit 320 does not have content, control unit 330 is without considering first service or second service In the case of the content that is received from content server 700 via buffer control device 500 by interface unit 310 of storage.Hereafter, The content stored can be sent to UE 100 by control unit 330.In another example, control unit 330 is controlled via caching Device 500 processed receives the content from content server 700.Then, control unit 330 can be used by interface unit 310 The content received is supplied to UE 100 by mirror image technology.Together with the offer of content, control unit 330 is stored from content The content that server 700 receives.In this way, when then there is the request for other UE of content, can will be deposited The content of storage is supplied to UE 100.

In addition, control unit 330 can using the IP address of content server 700 come by contents processing by content service The grouping that device 700 is sent, and these are sent packets into UE 100.As a result, from 700 request content of content server UE 100 identifies the content sent by buffer storage 300 and receives the content as the content sent by content server 700.

With reference to Fig. 4, in order to UE 100 be enable to receive the data from content server 700, it is necessary in UE 100 and interior Foundation connects between holding server 700.According to the embodiment of the present invention, respectively in operation S410 to S430 and operation S440 Connection between UE 100 and buffer control device 500 and buffer control device 500 and interior have been solely established into S460 Hold the connection between server 700.In the present embodiment, using TCP three-way handshake as example.Step S410 to S430 pairs Connection processing that should be between UE 100 and buffer control device 500, and step S440 to S460 is filled corresponding to buffer control Put the connection processing between 500 and content server 700.In other words, in step S410, UE 100 is directed to content server 700 send connection request message SYN.Then, buffer control device 500 replaces content server 700 to receive connection request message SYN.In addition, buffer control device 500 replaces content server 700 in response to connection request message SYN in the step s 420, And connection request message SYN and confirmation message ACK are sent to UE 100.At this point, buffer control device 500 can use content Connection request message SYN and confirmation message ACK camouflages (disguise) are to be taken by content by the IP address of server 700 The message that business device 700 is sent, and send the message through camouflage.

Therefore, UE 100 will confirm that message ACK is sent to content server 700 in step S430.Then, buffer control Device 500 replaces content server 700 to receive confirmation message ACK.Therefore, between UE 100 and buffer control device 500 Establish connection.

In addition, in step S440, it is interior that buffer control device 500 replaces UE 100 to be sent to connection request message SYN Hold server 700.Then, buffer control device 500 is received instead of UE 100 in step S450 and sent by content server 700 Connection request message SYN and confirmation message ACK.Hereafter, in step S460, buffer control device 500 replaces 100 sound of UE It should will confirm that message ACK is sent to content server 700 in the connection request message SYN of content server 700.With this side Formula establishes connection between buffer control device 500 and content server 700.As reference, in step S440 and S460 In, it can also use UE 100 IP address that will be sent to content server 700 connection request message SYN and confirmation message The information and sending that ACK disguise as is sent by UE 100.

According to the embodiment of the present invention, when determining to be stored in buffer storage 300 by the contents asked of UE 100, Buffer control device 500 can terminate the connection between buffer control device 500 and content server 700.Even if when with this Mode terminates the connection between buffer control device 500 and content server 700, it is not required that UE 100, which performs to establish, newly to be connected The additional process connect.This is because as described above, connection and buffer control between UE 100 and buffer control device 500 Connection between device 500 and content server 700 is solely established.

As it is shown in the figures, assume to establish 100 Hes of UE in step S510 according to reference to the process that Fig. 4 is described The connection between connection and buffer control device 500 and content server 700 between buffer control device 500.

UE 100 can send content request message with from 700 request content of content server.It then, please according to the content Message is sought, content server 700 provides content to UE 100.The content can be divided into a plurality of cell data, this is a plurality of Cell data can be included sequentially in content response message and send.

500 storage service list of buffer control device, to determine the type of the service to be provided when providing content. In service list, the type of the service provided according to content server 700 is classified and stored.Therefore, buffer control Device 500 can determine service to be provided by service list.Pass through the content request message and content response of reception At least one in message, buffer control device 500 determines the type of service to be provided.In other words, content requests disappear Both breath and content response message include the domain of content server 700.Therefore, buffer control device 500 is from content request message With the domain that content server 700 is extracted in any one in content response message.Hereafter, buffer control device 500 can be by Hold the domain of server 700 compared with service list, to determine the service to be directed to corresponding contents and provide.

Here, it is necessary to which buffer storage 300 provides service according to the type of the service determined by buffer control device 500. Therefore, the provisioning information bid indicator in the content request message sent from UE 100 of buffer storage 300, and this is interior Hold request message and send buffer control device 500 to.In this way, buffer storage 300 can ask buffer control device 500 The notice of service type is provided.

In addition, buffer control device 500 determines service type with reference to service list.Hereafter, 500 sound of buffer control device Content response message should be supplied to buffer storage 300 in content request message.Herein, transmitted content response message package Include information response's indicator of instruction service type.

For example, when content request message is HTTP GET messages and content response message is HTTP response message When, above- mentioned information bid indicator and information response's indicator can be respectively included in the HTTP GET messages and the HTTP In response message and send.At this point, information request indicator can be stored in content request message by buffer storage 300 In specific fields, and send the content request message.Therefore, buffer control device 500 can be with receive information bid indicator. Then, the content response message including information response's indicator is sent to buffer storage 300 by buffer control device 500.Caching Control device 500 can be responded indicator with indication information and is included in the specific fields of content response message, it is specified that indicating clothes Information response's indicator of service type, and send the content response message.

Then, the content request message sent by UE 100 is passed through into buffer storage in step S515, S520 and S530 300 and buffer control device 500 be transmitted to content server 700.Therefore, in step S525, buffer control device 500 is sent For confirming the confirmation of the reception of content request message (ACK) message.The ACK message is sent to UE via buffer storage 300 100.This content request message can be such as HTTP GET messages.In addition, in step S535, content server 700 will ACK message for confirming the reception of content request message is sent to buffer control device 500.In step S520, caching dress Putting 300 includes information request indicator in the content request message of transmission, and the content request message is sent to slow Deposit control device 500.Here, information request indicator is used to inquire the service type of buffer control device 500.In other words, Buffer storage 300 asks buffer control device 500 to provide service to be provided type (for example, first service or second service) Notice.

In addition, the content server 700 of reception content request message sends the content response message.Step S540, Content response message is sent to UE 100 via buffer control device 500 and buffer storage 300 in S550 and S555.In content In response message, a part for the content including being divided into cell data.As long as not providing Special controlling, content server 700 can continuously send content response message, until all the elements are sent as stopping.By division of teaching contents into a plurality of unit number According to, and predetermined number cell data is included in content in response message and sent.Here, cell data can be block. In the content response message sent in step S540, S550 and S555, a plurality of cell data that can include constitution content is worked as In only first cell data.

In step S545, the buffer control device 500 of reception content response message will be used to confirm content response message The ACK message of reception be sent to content server 700.In addition, in step S560, UE 100 sends to confirm that content is rung Answer the ACK message of the reception of message.ACK message is transmitted to buffer control device 500 via buffer storage 300.

During the above-mentioned transmission of content response message, it has been determined that the buffer control device 500 of service type rings information Indicator is answered to be included in content in response message, and in step S550 by the content response messaging to buffer storage 300.Information response's indicator indicates any one definite service (for example, first service).In other words, buffer control fills 500 are put by information response's indicator to notify identified service type to buffer storage 300.

As described above, when receiving content request message, buffer storage 300 is controlled by information request indicator to caching Device 500 processed inquires the type of service to be provided.With reference to service list, buffer control device 500 determines what is be provided The type of service.Hereafter, in response to inquiry, buffer control device 500 is by information response's indicator come logical to buffer storage 300 Know service type.In this way, the shared identified service type of both buffer storage 300 and buffer control device 500.This Afterwards, buffer storage 300 and buffer control device 500 provide corresponding service according to identified service type.

With reference to Fig. 6, as described in above in Fig. 4, it is assumed that have been set up between UE 100 and buffer control device 500 Connection and buffer control device 500 and content server 700 between connection.

In step S710, UE 100 sends content request message.The content request message can be such as HTTP GET Message.When receiving content request message, buffer storage 300 will be for asking the information request indicator of service type to include In content request message.Hereafter, in S715 is operated, buffer storage 300 will include the content requests of information request indicator Message is sent to buffer control device 500.Then, buffer control device 500 finds information request from content request message and refers to Show symbol.Hereafter, in step S720, content request message is sent to content server 700 by buffer control device 500.

The content server 700 of reception content request message is by content segmentation into a plurality of cell data.Content server 700 A plurality of cell data after segmentation is sequentially included in content in request message, and sends these content request messages.Step Rapid S725 shows content server 700 by several formant data packets of the content being made of a plurality of cell data It includes in content response message, and sends the content response message.It can be by content request message come sequentially or together When send several cell datas.For example, content request message can be HTTP response message.

In addition, content request message that buffer control device 500 can be received from step S715 and in step At least one middle extraction domain in the content response message received in S725, to identify content server 700.Then, cache Control device 500 is referred to service list to determine to be directed to the type of the service of the identified offer of content server 700.

Therefore, when after receiving content response message from content server 700 determine service type when, buffer control Information response's indicator of service type determined by instruction is included in content in response message by device 500.Hereafter, in step In S730, buffer control device 500 sends the content response message for including information response's indicator.Information response's indicator instruction Service type, and buffer storage 300 is also controlled to provide service according to service type.It is assumed that in step S730, caching The information response's indicator for indicating first service is included in content in response message and sends the content by control device 500 to be rung Answer message.

When receiving content response message, buffer storage 300 can be referred to by the information response of the content response message Show symbol, to find that first service needs to be provided for the transmission of content.In addition, buffer storage 300 will be in content response message Including content a part (at least one cell data) compared with the content stored.Then, buffer storage 300 can To determine whether the buffer storage 300 itself has the content.Hereafter, in step S735, buffer storage 300 is by content response Message is sent to UE 100.Here, buffer storage 300 will be by the way that buffer control device 500 is receiving, content server 700 Content response message be sent to UE 100.

The UE 100 of reception content response message can determine whether to receive by UE from the content response message received A part for the content of 100 itself request.Then, in step S740, UE 100 sends confirmation message.The confirmation message can be with It is such as ACK message.

In step S745, the buffer storage 300 for receiving confirmation message has entire content in the buffer storage 300 itself When send include caching inspection indicator confirmation message.The caching checks that indicator indicates that corresponding content is stored.

Order caching checks the buffer control device 500 of indicator it can be found that buffer storage 300 is stored in corresponding Hold.Therefore, in step S750, buffer control device 500 notifies not stop as caused by retransmitting and ask to content server 700 It retransmits, but is off the transmission of new cell data.

In addition, UE 100 sends confirmation message when can receive a cell data every time.Therefore, UE 100 is being operated Confirmation message is sent in S755.In order to provide first service, buffer storage 300 is obtained from the confirmation message sent by UE 100 For connecting the information established.Hereafter, buffer storage 300 kidnaps describe in Fig. 4, UE 100 and buffer control device 500 Between connection (CONNECTION HIJACKING).In this way, the connection between buffer storage 300 and UE 100 is built It is vertical.

Next, in step S765, buffer storage 300 sends out the Path Setup request message established for request channel Give buffer control device 500.In step S770, receiving channel establish request message buffer control device 500 release with The connection of content server 700.After the passage with buffer storage 300 is established, buffer control device 500 will in step S775 It is used to indicate the Path Setup response message that passage has been set up and is sent to buffer storage 300.

In addition, in step S780, its content is included in content in response message by buffer storage 300, and this is interior Hold response message and be sent to UE 100.At this point, buffer storage 300 continuously sends the part of the transmission before as the content Several cell datas after a plurality of cell data.This continues until that all the elements are sent as stopping.When buffer storage 300 When its content is included in content in response message, and the content response message is sent to UE 100, buffer storage 300 can It is rung with the content that the IP address for using content server 700 sends content response message disguise as from content server 700 Message is answered, and sends the content response message through camouflage.

Unless be updated before time expiration, before otherwise terminating buffer storage 300 and buffer control device 500 it Between the passage established.Therefore, when the transmission of content continues, buffer storage 300 will regularly be used to ask in S785 is operated The passage of the holding of passage keeps request message to be sent to buffer control device 500.Then, 500 regeneration period of buffer control device The full time, to keep passage.When all the elements are sent to UE 100 by buffer storage 300, buffer storage 300 is in step S790 Middle sendaisle terminates request.Then, buffer control device 500 terminates passage.Therefore, buffer control device 500 can identify Go out all the elements to be sent.

With reference to Fig. 7, as described in above in Fig. 4, it is assumed that have been set up between UE 100 and buffer control device 500 Connection and buffer control device 500 and content server 700 between connection.Can by with process described above Processing identical S710 to S745 performs step S810 to S845.

In step S810, UE 100 sends content request message.Then, 300 reception content request message of buffer storage, And information request indicator is included in the content request message.Hereafter, in step S815, buffer storage 300 will wrap The content request message for including information request indicator is sent to buffer control device 500.Then, buffer control device 500 is found Then content request message is sent to content server 700 by information request indicator in step S820.Reception content is asked The content server 700 of message is by content segmentation into a plurality of cell data.Hereafter, content server 700 will be in step S825 The a plurality of cell data of segmentation is sequentially included in content in request message, and sends the content request message.

The buffer control device 500 of reception content response message determines the clothes of the transmission for content with reference to service list Service type.Hereafter, information response's indicator of service type determined by instruction is included in content sound by buffer control device 500 It answers in message.Hereafter, in step S830, the content response that the transmission of buffer control device 500 includes information response's indicator disappears Breath.It is assumed that the information response's indicator for indicating second service is included in content in response message by buffer control device 500 at this time, And send the content response message.

When receiving content response message, buffer storage 300 can be indicated by the information response of content response message It accords with finding that second service needs to be provided for the transmission of content.In addition, buffer storage 300 can will be in content response message Including content a part compared with the content stored, with determine the content whether stored.Hereafter, in step In S835, content response message is sent to UE 100 by buffer storage 300.

The UE 100 of reception content response message can determine to receive by UE from the content response message received A part for the content of 100 itself request.Then, in step S840, UE 100 sends confirmation message.Receive confirmation message Buffer storage 300 determines whether the buffer storage 300 itself has entire content.Hereafter, in step S845, buffer storage 300 will indicate that there is the buffer storage 300 itself caching of the content to check that indicator and confirmation message are sent to caching Control device 500.Order caching checks that the buffer control device 500 of indicator and confirmation message can be found that buffer storage 300 It is stored with the content.In step S850, buffer control device 500 will confirm that message is sent to content server 700.

As described above, content server 700 sends into a plurality of cell data and sequentially content segmentation described a plurality of Cell data.In step S855, content server 700 was continuously sent before being used as successively by content response message A plurality of cell data after several cell datas of a part for the content sent.

In step S860, the buffer control device 500 for being sequentially received a plurality of cell data of content is sent and order The corresponding transmission control indicator of a plurality of cell data that ground receives.Transmission control indicator indicates buffer storage 300 to UE 100 continuously send the cell data after a part for the content that (step S835) is sent before by buffer storage 300.It passes Defeated control indicator is used to reduce the communication between buffer control device 500 and buffer storage 300.For this purpose, transmission control refers to Showing symbol includes identifying that needs are sent to the label information of the cell data of UE 100 by buffer storage 300.However, transmission control Indicator processed does not include all cell datas to be sent.Can label information be generated in various ways.For example, caching control Device 500 processed can compress all or part of of the subsequent cell data that are sent by content server 700, and use is through pressure The subsequent cell data of contracting are as label information.Alternatively, buffer control device 500 can be used in buffer control device Predetermined hashing algorithm is come from the subsequent cell data sent by content server 700 between 500 and buffer storage 300 Generate hashed value.In addition, buffer control device 500 can use generated hashed value as label information.

Buffer control device 500 can send the transmission control instruction of the label information including being used for recognition unit data Symbol.Then, in step S865, buffer storage 300 sends cell data according to the label information of transmission control indicator To UE 100.For example, when buffer control device 500 sends hashed value, unit number of the extraction of buffer storage 300 with hashed value According to, and the cell data extracted is sent to UE 100.As in afore-mentioned, when buffer storage 300 will be with biography It, can be in buffer storage 300 when the cell data of the content of the corresponding label information of defeated control indicator is sent to UE 100 The data for being sent the cell data disguise as from content server 700 using the IP address of content server 700, and The cell data through camouflage is sent in step S865.

With reference to Fig. 8, in step S905, control module 530 passes through interface module 510 and UE 100 and content server 700 exchange message.In this way, buffer control device 500 solely establishes and the connection of UE 100 and and content service The connection of device 700.This connection establishes processing as with reference to as Fig. 4 descriptions.

UE 100 can send content request message with from 700 request content of content server.In response to the content requests Content response message is sent to UE 100 by message, content server 700.Here, control module 530 can pass through interface module 510 reception content request messages and content response message.Therefore, in step S910, control module 530 is by content requests Domain specified at least one header in message and content response message identifies content server 700.

Hereafter, in step S915, control module 530 determines pin with reference to the service list stored in memory module 520 Whether the type to the service of the content server 700 of former (step S910) identification is first service or second service.Change sentence It talks about, control module 530 determines the class of the service to be applied when content server 700 sends the content asked by UE 100 Type.When service type is confirmed as first service, processing proceeds to step S920, and when service type is confirmed as second During service, processing proceeds to step S945.

When service type is first service, control module 530 is filled in step S920 by interface module 510 to caching The type for putting the service that 300 notices will be provided for corresponding contents transmission is first service.For example, control module 530 can be with The notice of service type is supplied to buffer storage 300 by the content response message for including information response's indicator by sending.

Hereafter, in step S925, control module 530 determines whether buffer storage 300 has as first service Target content.For this purpose, control module 530 by interface module 510 by the one of the content sent from content server 700 Part is sent to buffer storage 300.Then, the content that buffer storage 300 will store in the part of content and buffer storage 300 It is compared, and when the part of the content is identical with the content stored in buffer storage 300, determines the buffer storage 300 itself have content.Therefore, buffer storage 300 examines the caching for providing the substantial notice of buffer storage 300 storage itself It looks into indicator and is sent to buffer control device 500.Therefore, when receiving caching inspection indicator by interface module 510, control Molding block 530 determines that buffer storage 300 is stored with content.

When definite buffer storage 300 have content when, control module 530 in step S930 by interface module 510 come Content of announcement server 700 does not retransmit content.Therefore, it is interior in addition to situation about being retransmitted caused by the request as UE 100 Hold server 700 and stop content transmission.Hereafter, in step S935, (step S905) is established before control module 530 discharges With the connection of UE 100, the passage with buffer storage 300 is established, then release and the connection of content server 700.

On the other hand, when determining that buffer storage 300 does not have content in step S925, control module 530 is in step The inclusive segment being sequentially received from content server 700 is sent to buffer storage 300 in S940.

In addition, when it is second service to determine service type in step S915, control module 530 is led in step S945 It is second service to cross the type that interface module 510 notifies to be provided for the service of corresponding contents transmission to buffer storage 300.

Hereafter, in step S950, control module 530 determines whether buffer storage 300 has as second service Target content.As in step S925, when receiving caching inspection indicator from buffer storage 300, mould is controlled Block 530 determines that buffer storage 300 is stored with content.

When determining that buffer storage 300 has content in step S950, control module 530 is in step S955 by connecing Transmission control indicator including label information is sent to buffer storage 300 by mouth mold block 510.According to label information, caching dress Put the identical cell data of the cell data of content of 300 transmissions with being sent by content server 700.

On the other hand, when determining that buffer storage 300 does not have content in step S950, control module 530 is in step The inclusive segment being sequentially received from content server 700 is sent to by buffer storage 300 by interface module 510 in S960.

With reference to Fig. 9, as with reference to described in Fig. 4, it is assumed that have been set up the company between UE 100 and buffer control device 500 It connects and the connection between buffer control device 500 and content server 700.In addition, control unit 330 can pass through interface list Member 310 is received by the data sent of UE 100 and the data sent by content server 700.

When UE 100 sends the content request message for request content to content server 700, control unit 330 exists Pass through 310 reception content request message of interface unit in step S1000.Hereafter, in step S1005, control unit 330 passes through Content request message including information request indicator is sent to buffer control device 500 by interface unit 310.Here, information Bid indicator is used to inquire service type.

Then, buffer control device 500 includes information response's indicator in the content sent from content server 700 In response message, and send the content response message.Here, the clothes that the instruction of information response's indicator will be directed to content and provide The type of business.

Therefore, in step S1010, control unit 330 receives the content response message for including information response's indicator.So Afterwards, in step S1015, control unit 330 can be according to the service type indicated by information response's indicator, to determine to want pin The service provided content is first service or second service.

When determining that service is first service in step S1015, control unit 330 determines whether to deposit in step S1020 Contain corresponding content.Storage unit 320 has the first memory space assigned for first service.Therefore, control unit 330 can use a part for the content of received content response message to determine in the first memory space with the presence or absence of interior Hold.

It is assumed that being determined in step S1020 there are content, then control unit 330 passes through interface unit in step S1025 310 will indicate to check that indicator is sent to buffer control device 500 there are the caching of content.Order caching checks the slow of indicator It deposits 500 content of announcement server 700 of control device and does not send content.In addition, in step S1030, control unit 330 kidnaps UE Connection between 100 and buffer control device 500, and establish the connection between buffer storage 300 and UE 100.Hereafter, exist In step S1035, control unit 330 sends the Path Setup request message for asking to establish passage by interface unit 310, thus Establish the passage with buffer control device 500.Then, in step S1040, control unit 330 will be stayed by interface unit 310 The content deposited is sent to UE 100.

On the other hand, it is assumed that determine that there is no contents in step S1020.Then, control unit 330 is in step S1045 It is middle to store the content received from buffer control device 500 by interface unit 310.In addition, control unit 330 passes through interface list Member 310 sends stored content to UE 100.

In addition, when it is second service to determine service in step S1015, control unit 330 determines in step S1050 With the presence or absence of corresponding content.Storage unit 320 has the second memory space assigned for second service.Therefore, control Unit 330 can use a part for the content of the content response message received from buffer control device 500 to determine It whether there is content in two memory spaces.

It is assumed that being determined in step S1050 there are content, then control unit 330 passes through interface unit in step S1055 310 will indicate to check that indicator is sent to buffer control device 500 there are the caching of content.

When finding that buffer storage 300 has content, buffer control device 500 sends the transmission control for including label information Indicator.Indicator is controlled by transmitting, buffer control device 500 can reduce the business in core network 400.Then, exist In step S1060, control unit 330 according to received transmission control indicator label information by interface unit 310 come The cell data of constitution content is sent to UE 100.In other words, control unit 330 will use the label information that receives and The cell data of the retention content of identification is sent to UE 100.For example, when buffer control device 500 sends hashed value, control Unit 330 has the cell data of hashed value from the extraction of storage unit 320.Hereafter, control unit 330 passes through interface unit 310 Send extracted cell data.On the other hand, when finding that buffer storage 300 does not have content, buffer control device 500 exists The content received from buffer control device 500 by interface unit 310 is stored in step S1065.Hereafter, control unit 330 The content stored is sent to UE 100.

This method of transmission content according to the embodiment of the present invention can be implemented as computer-readable record and be situated between Computer-readable code in matter.Computer readable recording medium storing program for performing can individually comprise program instruction, data file, data knot Structure etc. is combined including it.Computer readable recording medium storing program for performing includes being stored with by the data, all of computer system-readable The recording device of type.The example of computer readable recording medium storing program for performing includes magnetic medium (such as hard disk, floppy disk and tape), optics is situated between Matter (such as compact disc read-only memory (CD-ROM) and digital video disc (DVD)), magnet-optical medium (such as floptical) and special It is configured to store and execute hardware unit (such as ROM, random access memory (RAM) and the flash storage of program instruction door Device).

In addition, computer readable recording medium storing program for performing is distributed in computer system connected via a network, enabling with Distributed way storage and computer readable code executed.The programmer in technical field belonging to the present invention easily exports energy It is enough in function program, code and the code segment for implementing the present invention.

Have been described above and show to illustrate the preferred embodiment of the technical spirit of the present invention, but it is of the invention The composition and effect that is not limited to show and describe.Those of ordinary skill in the art, which will be appreciated that, not to depart from the feelings of technical spirit The various changes and modifications of the present invention are carried out under condition.It is therefore to be understood that all appropriate changes, modifications and equivalent It is within the scope of the present invention.

Industrial applicibility

The present invention relates to content delivery techniques, are transmitted more particularly, in a manner of differentiation to user equipment (UE) The method and its device of content.According to the present invention, in the case of first service, stop the transmission of content server, and delay Cryopreservation device provides content to UE by oneself, enabling removal is placed in the respective treated load with content server sheet. In the case of second service, the data sent from content server are not transmitted actually.On the contrary, buffer control device controls Transmission of the buffer storage by including label information controls indicator to send same data.Therefore, even if content server Load is kept intact, and can also be reduced the business in network and be prevented transmission delay.Specifically, the invention allows to from UE The message identification service target sent and received between content server, and by service list according to service type come pipe Manage target.Therefore, it is possible to provide differentiated service according to service type.Enough in the presence of commercialization or the sale present invention can Energy property, and can clearly and repeatedly implement the present invention in practice.Therefore, the present invention is industrially applicable.

Claims

1. a kind of buffer control device for content transmission, the buffer control device includes：

Interface module is configured to communicate with buffer storage and content server；

Memory module is configured to storage service list, and record has the clothes of corresponding content server in the service list Service type；And

Control module, be configured to according to from the interface module receive and request content content request message, with And from the interface module receive and transmit the content content response message in it is at least one come identify it is described in Hold server, to determine the service class of the content server with reference to the service list stored in the memory module Type, and perform control so that the indicator of service type determined by instruction is sent to described by the interface module Buffer storage,

Wherein, the service type instruction is taken by what the buffer control device or the buffer storage provided for the content The type of the content distribution network CDN service of business device.

2. buffer control device according to claim 1, wherein, when identified service type is first service, institute State control module notifies the content server to stop sending the content by the interface module.

3. buffer control device according to claim 1, wherein, when identified service type is second service, institute Stating control module will be for identifying that it is described slow that the label information of the cell data of the content is sent to by the interface module Cryopreservation device is set so that the cell data of the content is sent to user by the buffer storage according to the label information Standby UE.

4. buffer control device according to claim 1, wherein, the control module will be from institute by the interface module The part for stating the content of content server reception is sent to the buffer storage, so that the buffer storage passes through institute The part of content is stated to determine whether the buffer storage has the content.

5. a kind of buffer storage for content transmission, the buffer storage includes：

Interface unit is used to communicate with user equipment (UE) and buffer control device；

Storage unit has the memory space that multiple contents are stored according to service type；And

Control unit is configured to that instruction content server ought be received from the buffer control device by the interface unit Service type indicator when, service type is found by the indicator received, and according to the service class found Type performs control so that and content is sent to the UE in a different manner,

6. buffer storage according to claim 5, wherein, when the service type found is first service, the control Unit processed performs control so that the inclusive segment identical with the inclusive segment of the content server among the multiple inclusive segment leads to It crosses the interface unit and is sent to the UE.

7. buffer storage according to claim 5, wherein, when the service type found is second service, the control The cell data for the content that unit processed will use the label information received by the interface unit to identify is sent To the UE.

8. buffer storage according to claim 5, wherein, the memory space includes storing corresponding with first service Content first service storage region and second service storage region for storing corresponding with second service content,

The content being stored in the first service storage region is not deleted within the pre-set period, and

The content being stored in the second service storage region according to for the content request frequency and be kept or It deletes.

9. a kind of content transfer method of buffer control device, the described method comprises the following steps：

According to the content request message for request content and for transmitting at least one in the content response message of the content It is a to identify content server；

Reference record has the service list of the service type of corresponding content server to determine the service of the content server Type；And

The indicator of service type determined by instruction is sent to buffer storage,

10. according to the method described in claim 9, the method is further comprising the steps of：

After the indicator is sent, when identified service type is first service, the content server is notified to stop The only transmission of the content.

11. according to the method described in claim 9, the method is further comprising the steps of：

After the indicator is sent, when identified service type is second service, label information is sent to described Buffer storage so that the cell data of the content identified according to the label information is sent to use by the buffer storage Family equipment UE.